Jim -
I recently had the failure of a 170pF doorknob in an Ameritron AL-1500
160M padding section. Replacements readily available:
http://www.ameritron.com/Product.php?productid=290-0170-7
I believe Surplus Sales of Nebraska and RF Parts also sell the HEC
doorknobs. 170pF sure seems to be a "sweet spot" value from its wide use
and availability.
Tim N3QE
On Sun, Dec 20, 2015 at 4:38 PM, Jim Murray via Topband <
topband@contesting.com> wrote:
>
> After a pretty thorough check on the ailing 160M section this what I have
> in mind and would appreciate any further suggestions. All previous owner
> wiring is ok. One missing connection is 10M mod. 160M Padding cap (170pf,
> 7500V doorknob) is shot. Band switch appears to be still usable, no damage
> to contacts etc. Idea now is to replace the cap (with "corona washer") or
> good mica cap, new style parasitic suppressor, new (al-80a) plate choke and
> give it a whirl.
>
> Regards,jim/k2hn
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